https://www.jewishlinknj.com/features/25956-what-did-they-know-when-did-they-know-how-did-they-interpret-the-information-2
Part II
Initial Reaction of American Jews to the Beginning of the War in Europe
American Jewish leaders were not surprised that the war would produce immense suffering for their European brethren. The initial reports deeply concerned them about the precarious position of the Jews in Eastern and Central Europe. Even before the war began, Hayim Greenberg, head of Poalei Zion and editor of the Labor Zionist Jewish Frontier, warned on June 15, 1939, that Jews “will be the first to suffer,” and that the conflict “might envelope the entire world.”
On September 13, 1939, Jacob Lestchinsky, the noted historian, sociologist and authority on Jewish demography and economic history, advised American Jews “to be prepared for events whose frightfulness will eclipse” the pogroms and massacres of the last war. “Human imagination,” he said, “is simply too limited to grasp the probable magnitude of the war’s toll or how much Jewish blood will be shed.” He feared the Jews of Ukraine, Galicia and Romania were in grave danger.
Writing in B’nai B’rith’s The National Call in October, 1939, Albert Viton, a journalist who reported from Palestine before joining the US Department of Agriculture in early 1940, observed that “everywhere Jews are the chief sufferers…and that there is no limit to their possible misery….” He believed that “a terribly large portion of Jews in Central, Eastern and Northern Europe will not survive the war; possibly as many as half of them will perish before the end.”
In the September-October 1939 issue of the Contemporary Jewish Record, published by the American Jewish Committee (AJC), the Committee expressed uncertainty as to what awaited the Jews in the future. “It is as yet too early today to comprehend the full extent of the tragedy which has overtaken the world… but [it] is sufficiently great to defy the imagination and stir the deep sympathy of those who still believe in mercy, justice and the protection of the weak.”
The November 1939 edition of The Call, the official organ of the English-speaking division of the Workman’s Circle, acknowledged that European Jewry would be greatly affected. “In the coming days, the areas of Jewish wretchedness will increase, the intensity of Jewish agony will reach a breaking point.”